本研究では，研究代表者がこれまでに開発した乳酸応答性ポリマーを，様々な模様を描いて布地と複合化することにより，汗中の乳酸濃度に依存して図柄が変化するスポーツウェアの創製に向けた基礎的検討を行った．乳酸応答性ポリマーと布地との複合化は，モノマー溶液を木綿布に含浸させ，所定の形状の光透過部を有するフォトマスクを介して紫外線を照射し，重合させる方法により行った．得られたサンプルをアニオン色素で着色した後，乳酸水溶液に浸漬したところ，乳酸に応答した色素の脱離が生じ，布上の図柄が変化していった．応答の乳酸濃度依存性と経時変化を検討した結果，汗中に存在する乳酸の濃度範囲内で，30分以内に図柄が「笑顔」から「泣き顔」へ変化することが明らかになった．

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An animal species’ diet constitutes the basic ecology of that species and is indispensable for understanding its ecological niche. Crows (Corvus corone and C. macrorhynchos) gather at communal roosts in winter and regurgitate indigestible portions of food as pellets on the ground under the roost. We used pellet analysis to determine crows’ diets and compared them between agricultural (Joetsu region, Niigata) and urban areas (Tokyo) in 2002 winter, The pellets were classified into plant animal and artificial matter. The major food substance in both areas was plant matter. The pellets collected in the Joetsu region were shaped like bullets and contained primarily seeds of Oryza sativa and Rhus spp. The pellets collected in Tokyo had loose texture and were flattened, and contained plant matter such as fruits and berries of trees and shrubs, Second in frequency to plant matter was artificia1 matter consisting of small pieces of white or transparent plastic usually used for garbage bags. Artificial matter also contained aluminum foil and paper, a1l of which are used for food wrappings, suggesting their association with food scraps. In this study, we discussed the utility of crow pellets for teaching food webs and the environmental issues such as garbage disposal.

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In this review, a new method for the preparation of metal-assembled complexes based on copper(II) acetate type dinuclear systems has been reported. A variety of coordination modes of carboxylato group were classified into ten types of groups including bis-, tris-, and tetrakis-bridging based on our complexes and discussed in relation to mononuclear, dinuclear, oligonuclear, and polynuclear systems. An interdimer interaction could not be observed in temperature dependence of magnetic susceptibilities at 4.5—300 K region in case of one-dimensional chain systems of copper(II) pivalate with N,N'-bidentate ligands such as pyrazine, 4,4'-bipyridine, 1,4-diazabicyclo[2.2.2]octane. Adsorption property for nitrogen gas was found in a chain system of copper(II) benzoate with pyrazine. Mesomorphic properties were also found for chain systems of copper(II) carboxylates with long alkyl chains. By using copper(II) trichloroacetate, a chain molecule consisting of alternated arrangement of tetranuclear cubane and pyrazine was isolated. Two-dimensional and three-dimensional assembled complexes were obtained by reactions of copper(II) trifluoroacetate and copper(II) propionate, respectively, with pyrazine. Bis-adducts of copper(II) propionate with pyridyl nitronyl nitroxides, copper(II) acetate with a stable adamantanyloxyamino radical, and dinuclear copper(II) complexes with 4-carboxy-2,2,6,6-tetramethylpiperidinyloxy and 3-carboxy-2,2,5,5-tetramethyl-1-pyrrolidinyloxy were prepared as radical-containing copper(II) acetate systems.

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